stats: chi-square test stat

Solve the problem.

A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data beolow. Calculate the chi-square test statistic χ² to test the claim that the probabilities show no preference.
Brand 12 345Customers 3055651832

A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data beolow. Calculate the chi-square test statistic χ² to test the claim that the probabilities show no preference.

Brand 12 345
Customers 3055651832

how do i solve the problem?

The expected frequencies if there is no difference in preference are all 50.